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Ubuntu Security Notice USN-7208-1
January 16, 2025

bcel vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Apache Commons BCEL could be made to crash or run programs
if it received specially crafted network traffic.

Software Description:
- bcel: Analyze, create, and manipulate (binary) Java class files

Details:

Felix Wilhelm discovered that Apache Commons BCEL APIs
incorrectly handled parameters due to a memory issue. An
attacker supplying malicious input could exploit this to
generate and execute arbitrary bytecode.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS
libbcel-java 6.5.0-1ubuntu0.1

Ubuntu 20.04 LTS
libbcel-java 6.4.1-1ubuntu0.1~esm1
Available with Ubuntu Pro

Ubuntu 18.04 LTS
libbcel-java 6.2-1ubuntu0.1~esm1
Available with Ubuntu Pro

Ubuntu 16.04 LTS
libbcel-java 6.0~rc3-2ubuntu1+esm1
Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-7208-1
CVE-2022-42920

Package Information:
https://launchpad.net/ubuntu/+source/bcel/6.5.0-1ubuntu0.1